Environmental laws are created in the same way as all other laws. First the law must be written and sent to the House. A Standing Committee will review the bill and do one of three things.
They could send the bill back
make changes to the bill and send it back
or they could table the bill. (This means they cant do anything with it).
If the bill is sent back without any changes then the bill will go on a calender and will wait pass through a vote. In order for the bill to advance it must gain two thirds of the overall vote.
From here the bill is sent for consideration at the floor of the House. During consideration amendments may be added. If the bill passes by majority it goes to the next stage, the senate.
While at the senate the bill is assigned to another Standing Committee who review the bill and release or table it.
How Are Environmental Laws Made?
Leo. Dept. home page. 2004. Lehigh University. 22 Apr. 2008<http://www.leo.lehigh.edu/envirosci/enviroissue/lawsregs/lawmap.htm>.